J.01_SOW_Penstock_No_5.pdf

SCOPE OF WORK FOR UPGRADING THE HYDRAULIC GATE

SYSTEM AT AMISTAD DAM PENSTOCK NO. 5

I. GENERAL REQUIREMENTS

1. General Scope:

The vendor is required to upgrade the hydraulic gate and hydraulic gate operating system at Penstock No. 5 (the works). The works shall include upgrading the hydraulic system, installation of new stainless steel hydraulic piping and pressure testing the piping; all in accordance with Article V “Scope of Work”.

2. Project Location:

The USIBWC Amistad Office is located at 670 Texas Spur 349, Del Rio, Texas 78840; about 15 miles from downtown Del Rio. The Dam is a couple of miles from the office.

The work is located completely within the United States, but is directly adjacent to the international border with Mexico. The international border is clearly identified at the centerline of the dam. Any excursions into Mexico subject the Contractor to Mexican laws.

II. AMISTAD DAM

1. Amistad Dam, constructed and completed in 1969 by the United States (U.S.)

and Mexico pursuant to the Water Treaty of 1944, is located on the Rio Grande 12 miles northwest of Del Rio, Texas, 574 river miles above the mouth of the Rio Grande, and 1 river mile below confluence of the Devils River.

2. The dam is used for flood control, water conservation, hydroelectric power, and recreation. The dam is operated and maintained by the International Boundary and Water Commission (IBWC); an international body composed of the United States Section and the Mexican Section.

III. GENERAL PROVISIONS:

Contractor:

1. All the work shall be performed by a professional contractor with experience in mechanical/ hydraulic systems. The Contractor shall have a minimum of 3 years of experience in identical or similar systems and shall submit a list of clients and their respective contact information for reference.

2. The work shall be carried out by experienced professional crew properly trained in this type of work. The Contractor shall maintain adequate staffing level to complete the works within the Contract period.

3. The Contractor shall designate and assign an experienced on-site representative to be present during all on site activities. The Contractor on-site representative shall have a minimum three year experience in identical or similar projects.

4. The Contractor shall provide all labor, equipment, materials, supplies, utility and incidentals to complete the project as identified under this SOW. Notwithstanding the utility offered by the Government under the following sub-article “Utility Provided by the Government”, the Contractor is solely responsible for providing those utilities.

5. All Vendors are encouraged to attend the pre-bid conference and site visit; and verify site conditions including the voltage of any accessible electric power source. The Contractor is deemed to have field verified the existing conditions prior to submitting his proposal and prior to commencement of the work.

6. The contractor may install a site office at a location near the dam. The site has been used for setting a temporary office by contractors in the past.

7. The Contractor shall be responsible for all safety and quality control features required for work of this nature.

8. The Contractor shall be fully responsible for repairs or replacement of all damages to existing conditions resulting from the actions or lack thereof of the contractor, his employees, his subcontractors or their employees.

Utility Provide by the Government:

1. The Contractor may have access to the available electric power at Penstock# 5.

However, the Government is not responsible if power is not available for any reason or does not meet the Contractor’s requirements.

2. The Contractor may have access to the limited restroom facilities at the dam.

However, other sanitary facilities or trash disposal shall be provided by the Contractor at no additional cost.

3. If the contractor opts to install a site office, the Government will provide a site with access to potable water and electric power.

Material and workmanship:

1. All material used shall be new and conform to standard construction industry specifications and means and methods of construction.

2. All material to be incorporated in the works shall be made in the United States of America.

3. The Contractor shall submit technical specifications of all material to be incorporated in the contract prior to procurement. The Contractor shall submit all manufacturer literature, specifications, samples and certifications as stated under ”Submittals”.

Government Representatives:

1. The USIBWC’s representatives for this Contract are the Contracting Officer (CO) and the Contracting Officer’s Representative (COR).

2. The Contracting Officer (CO) is responsible for the Contract, including its terms and conditions. The CO is authorized to enter into and administer the Contract, change or terminate the Contract, and make determinations and findings relating to the Contract.

3. The CO shall notify the Contractor in writing of the COR appointment and the limits of the COR authority.

4. The COR is the USIBWC’s representative in direct daily contact with the Contractor. The COR is the Contractor’s initial Point Of Contact with USIBWC during the performance of this Contract.

Drawings and Photographs:

The following drawings and photographs are provided to the Contractor for reference. The documents shall be available at a File Transfer Protocol (FTP) site set up by the USIBWC:

1. Drawing No. 18371 – Regulating Gate - Bonnet Assembly and Details.

2. Drawing No. 18372 – Regulating Gate - Pedestal Assembly and Details.

3. Drawing No. 18263 – Regulating Gate - Hydraulic Cylinder and Details I

4. Drawing No. 18374 – Regulating Gate - Hydraulic Cylinder and Details II

5. Drawing No. 18375 – Regulating Gate - Hydraulic System Layout and

Details.

6. Drawing No. 18376 – Regulating Gate - Hydraulic System equipment

Layout.

7. Drawing No. 18377 – Regulating Gate – Selsyn Gate Position Indicator

Detail I.

8. Drawing No. 18268 – Drainage Piping - Selsyn Gate Position Indicator

Detail II.

9. Drawing No. 18379 – Regulating Gate - Modification to Penstock No. 5.

10. Drawing No. 18380 – Regulating Gate- Modification to Penstock No. 5 –

Reinforcing.

11. Drawing: Plate 24 – Regulating Gate Hydraulic System Equipment layout.

12. Photo 1: Hydraulic Power Unit for Penstock# 5 Gate.

13. Photo 2: Hydraulic Control Valve

14. Photo 3: Gate Slot – Penstock# 5 Hydraulic Gate

15. Photo 4: Supply and Return Lines to Cylinder.

16. Photo 5: View looking down gate slot.

Standards and Codes:

The work under this contract shall be performed in accordance with the latest ANSI, OSHA and other applicable industry standards including, but not limited to, the following:

2. ANSI A10.32 Fall Protection Systems for Construction and Demolition.

3. OSHA 3146 - Fall Protection regulation.

4. ASME B.32 Pressure piping.

5. US Army Corps of Engineers (USACE) Manual EM 385-1-1 Safety and Health

Requirements

Facility Operations:

1. There may be agency employees and/ or contractors working at the Dam. The contractor shall coordinate his activities with other stakeholders on site so that he does not impede their activities.

2. The Contractor shall coordinate all on site activities so as not to interfere with the regular daily function of the facilities.

3. The Contractor shall confine all operations, storage of material and employees' parking within designated areas as approved by the COR.

4. The Contractor is responsible for any damage caused by the activities of his employees, his subcontractors or their employees to existing facilities including pavements and curbs.

The Contractor shall repair such damage to the satisfaction of the COR.

Submittals:

The Contractor shall submit the following documents during the term of the contract:

1. Work schedule: The work schedule shall be submitted at or before the “Pre- Commencement Meeting”. The schedule shall show the main activities, their durations, schedule of values and the Critical Path.

2. A safety plan in accordance with OSHA and industry standards including but not limited to OSHA Fall Protection regulation OSHA 3146. The plan shall be submitted at or before the pre-commencement meeting. The safety plan shall be accepted by the USIBWC before commencement of work. Notwithstanding acceptance of the safety plan by USIBWC, the contractor remains solely responsible for safety during the performance of the work under this contract.

3. The resume for an on-site representative with at least three year experience in identical or similar projects.

4. Weekly reports charting the work progress against the agreed schedule as well as a weekly record of safety measures. The report for each week shall be due on the first working day of the following week.

5. Technical specifications of all material to be incorporated in the contract prior to procurement. The Contractor shall submit all manufacturer literature, specifications, samples and certifications and obtain USIBWC approval before purchasing any item for applying to or incorporation into the work.

6. Written summary report documenting the inspections, findings, repairs and tests;

including data tables of hydraulic system pressure tests

The USIBWC shall approve, accept or otherwise respond to each submittal from the contractor within five (5) working days.

Pre-commencement Meeting and Coordination with others:

1. The Contractor shall be available for pre-commencement meeting with the COR within one week of receiving the COR appointment letter. The meeting shall be initiated and coordinated by the COR.

2. The Contractor shall submit at or before the meeting one hard copy and one electronic copy of his work schedule. The schedule shall account for all stages of the Contract including approvals by USIBWC and activities on site.

3. The contractor shall submit, at or before the meeting, a safety plan in accordance with OSHA, ANSI, USACE Manual EM 385-1-1, and industry standards for review acceptance by USIBWC before commencement of the work on site.

Acceptance of the safety plan by USIBWC shall not relieve the contractor of any part of its sole responsibility for safety under this contract.

4. The Contractor shall provide at or before the pre-commencement meeting the resume for an on-site representative with at least three year experience in identical or similar projects.

5. Following the pre-commencement meeting, the COR shall issue the “Notice To

Proceed” starting at least seven calendar days after the pre-commencement Meeting date.

Contractors Access at USIBWC Field Office:

1. The working hours shall be from 07:30 AM to 04:30 PM Monday through Friday except for Federal Holidays. Working outside those hours shall be authorized in writing by the Government.

2. USIBWC facilities are closed during all Federal Holidays. The Contractor shall not schedule work during the following Federal Holidays

New Year’s Day. Labor Day.

Martin Luther King Jr Birthday. Columbus Day.

Washington’s Birthday Veterans Day.

Memorial Day Thanksgiving Day.

Independence Day Christmas Day.

3. Access to the work site is through a port of entry controlled by the Custom and Border Security. Workers crossing through the port of entry need to have proper documentation for reentry to the United States.

4. The port of entry is open from 10:00 a.m. to 6:00 p.m. If the Contractor requires to begin work prior to the port of entry opening, this must be coordinated with the Amistad Dam Area Operations Manager. Contractor personnel can be allowed onto the project site prior to 10:00 am, but they must wait for the Port of Entry to open before leaving the project site.

5. Compressed air is not available at the dam. The contractor shall provide any compressed air that is required during the performance of this contract.

6. Field office telephones and restroom facilities are not available to the Contractor’s employees. However the contractor may have access to the limited restroom facilities at the dam. Beyond that, the Contractor shall make alternative arrangements before commencement of site operations.

7. Security is a major concern at this location which is adjacent to the international boundary. The Contractor is responsible for securing the work site, equipment, and materials from vandalism and theft.

IV. BACKGROUND:

Penstock #5 was originally designed to be a “dual gated” 15 foot irrigation outlet (penstock). Both gates were designed as tractor (cable operated) gates and weigh 48,000 pounds each. The dual gates are generally referred to as the Upstream Penstock Gate (aka head gate) and the Downstream Penstock Gate (aka operating or irrigation gate) and are positioned approximately 10 feet apart. Depending on the action or results desired, these gates could be lowered 190 feet down their respective Upstream or Downstream gate slots or could be hung in the penstock service bay, located 190 feet above the penstock invert, for servicing.

During construction, the downstream (irrigation) gate was replaced with a hydraulic slide gate. The upstream (head gate) was left as originally designed and is currently in the down (or closed) position. Upstream of both penstock #5 gates is a bulkhead gate slot;

however (by design) only one (1) Bulkhead Gate was delivered at Amistad during construction and it is currently being used in Penstock# 4.

The hydraulic gate has been in the closed position since at least 2010, and the following observations were made during the last, (unsuccessful) attempt to operate the gate:

A. Hydraulic Operating System

1. The Hydraulic Gate Pump was completely operational and quickly built adequate pressure to the control valve

2. When the control valve was moved to the open gate position, the hydraulic fluid was heard feeding the hydraulic feed lines; however pressure was quickly lost.

3. Visual observation down the gate slot (maybe 40-50 feet down the slot) indicated a spray of hydraulic fluid being lost from the feed lines.

4. There was no indication of gate movement; probably due to the loss of hydraulic pressure.

B. Hydraulic Gate

1. The last time the gate was physically inspected is believed to be in the 1980's.

2. Access to the back side of the gate (downstream side) is 190 foot down the 4 foot by 24 foot penstock gate slot and through an approximate 2.5 foot opening behind the gate.

3. The current physical condition of the gate (wear, corrosion, etc.) is unknown.

4. Similarly the physical condition of the concrete portion of the penstock where the gate frame in embedded in the concrete, as well as that of the Concrete/ Penstock liner interface is unknown.

5. The hydraulic gate was known to have a "chatter" problem at certain gate openings: and during normal operations in 1998 it was reported that the gate would "bleed off" and would not hold a gate opening.

6. The hydraulic gate is framed (and seals) to the upstream side of the penstock concrete.

V. SCOPE OF WORK:

I. The objective is to upgrade the hydraulic gate at Penstock# 5 and replace the leaking hydraulic piping. The contractor shall:

1. Replace approximately 400 feet of hydraulic piping and fittings with ¾”

Stainless Steel piping and fittings extending 190 feet down the gate slot.

The size of the replacement piping and fitting shall be the same as that of the existing piping and fitting; and the rating shall equal or exceed the existing rating.

2. Pressure test the installed piping.

II. Safety is a major concern for this contract. The Contractor shall place particular emphasis on safety procedures for conducting the work at Penstock# 5. The Contractor shall:

1. Provide all equipment necessary to access all parts of the hydraulic gate assembly, safely navigating the 190 feet depth of the gate slot. The equipment shall be available for use by USIBWC Staff or third party representative at no additional cost.

2. Develop a detailed Safety Plan that meets or exceeds the requirements of OSHA Standards, USACE Manual EM 385-1-1, Sand ANSI standards for fall protection. Review and discuss the safety plan with the USIBWC Staff and third party representative and reach consensus.

3. Prepare a daily safety report recording all safety related features of the work for the day including how the safety plan was implemented and any incidents or near miss.

4. Meet, each day before proceeding to the work site at Penstock# 5, with the USIBWC staff and third party representative (USACE) and review the work plan and safety features of the work for that day.

VI. NON-DISCLOSURE

All aspects of this work are considered property of the Government. No release of any information or opinion related to this work is permitted by the Contractor or the Contractor Employees or agents without written authorization of the United States Section, International Boundary and Water Commission.

VII. SCHEDULE:

Delivery period shall be Forty-Five (45) calendar days from the “Notice to proceed”. The Contractor shall mobilize, complete the initial inspection, replace the hydraulic piping and fittings, and pressure test the new piping system within forty-five calendar days.

VIII. PRICING:

The work as required in accordance with this scope shall be provided at a Firm Fixed Price (FFP). The contractor is deemed to have allowed for the replacement of the hydraulic system piping and fittings.

IX. PAYMENTS

No progress payment shall be entertained under this contract. The Contractor shall submit one invoice upon completion of the works.

END